diff --git a/src/test/scala/util/StringUtilSpec.scala b/src/test/scala/util/StringUtilSpec.scala
index 0b77ac9..26056a5 100644
--- a/src/test/scala/util/StringUtilSpec.scala
+++ b/src/test/scala/util/StringUtilSpec.scala
@@ -18,4 +18,21 @@
     }
   }
 
+  "escapeHtml" should {
+    "escape &, <, > and \"" in {
+      StringUtil.escapeHtml("<a href=\"/test\">a & b</a>") mustEqual "&lt;a href=&quot;/test&quot;&gt;a &amp; b&lt;/a&gt;"
+    }
+  }
+
+  "md5" should {
+    "generate MD5 hash" in {
+      StringUtil.md5("abc") mustEqual "900150983cd24fb0d6963f7d28e17f72"
+    }
+  }
+
+  "sha1" should {
+    "generate SHA1 hash" in {
+      StringUtil.sha1("abc") mustEqual "a9993e364706816aba3e25717850c26c9cd0d89d"
+    }
+  }
 }
diff --git a/src/test/scala/util/ValidationsSpec.scala b/src/test/scala/util/ValidationsSpec.scala
new file mode 100644
index 0000000..f383c46
--- /dev/null
+++ b/src/test/scala/util/ValidationsSpec.scala
@@ -0,0 +1,34 @@
+package util
+
+import org.specs2.mutable._
+
+class ValidationsSpec extends Specification with Validations {
+
+  "identifier" should {
+    "validate id string " in {
+      identifier.validate("id", "aa_ZZ-01") mustEqual None
+      identifier.validate("id", "_aaaa") mustEqual Some("id starts with invalid character.")
+      identifier.validate("id", "-aaaa") mustEqual Some("id starts with invalid character.")
+      identifier.validate("id", "aa_ZZ#01") mustEqual Some("id contains invalid character.")
+    }
+  }
+
+  "color" should {
+    "validate color string " in {
+      color.validate("color", "#88aaff") mustEqual None
+      color.validate("color", "#gghhii") mustEqual Some("color must be '#[0-9a-fA-F]{6}'.")
+    }
+  }
+
+  "date" should {
+//    "validate date string " in {
+//      date().validate("date", "2013-10-05", Map[String, String]()) mustEqual Nil
+//      date().validate("date", "2013-10-5" , Map[String, String]()) mustEqual List(("date", "date must be '\\d{4}-\\d{2}-\\d{2}'."))
+//    }
+    "convert date string " in {
+      val result = date().convert("2013-10-05")
+      new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(result) mustEqual "2013-10-05 00:00:00"
+    }
+  }
+
+}